/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; /* 使用现代无衬线字体 */
    background-color: #1e1e1e; /* 深色背景 */
    color: #ffffff; /* 白色文字 */
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #2a5298; /* 深蓝色背景 */
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.navbar .logo {
    font-size: 24px;
    color: #ffffff;
    text-decoration: none;
}

.navbar .nav-links {
    display: flex;
    gap: 20px;
}

.navbar .nav-links a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.navbar .nav-links a:hover {
    color: #ff6600; /* 点缀色 */
}

/* 侧边栏导航样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 60px;
    width: 250px;
    height: calc(100% - 60px);
    background-color: #2a5298;
    padding: 20px;
    transition: transform 0.3s;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin-bottom: 15px;
}

.sidebar ul li a {
    color: #ffffff;
    text-decoration: none;
    font-size: 18px;
    transition: color 0.3s;
}

.sidebar ul li a:hover {
    color: #ff6600;
}

/* 主要内容区域样式 */
.main-content {
    margin-left: 270px; /* 侧边栏宽度 + 间距 */
    padding: 80px 30px 30px 30px;
    background-color: #1e1e1e;
    min-height: 100vh;
}

/* 提示信息样式 */
.prompt {
    background: linear-gradient(135deg, #ff6600, #e65c00);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    font-size: 18px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

/* 文章样式 */
article {
    background-color: #2a5298;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

article h2, article h3, article h4 {
    color: #ff6600; /* 点缀色突出标题 */
}

article p {
    font-size: 16px;
    color: #ffffff;
}

article pre {
    background-color: #1e3c72;
    color: #ffffff;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    max-width: 320px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.5);
    transition: transform 0.3s, box-shadow 0.3s;
}

img.decorative:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 8px rgba(0,0,0,0.7);
}

/* 响应式布局 */
@media (max-width: 1200px) {
    .main-content {
        margin-left: 220px;
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 80px 20px 20px 20px;
    }

    .navbar .nav-links {
        display: none;
    }

    .navbar .menu-toggle {
        display: block;
        cursor: pointer;
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    article {
        padding: 20px;
    }

    .prompt {
        font-size: 16px;
        padding: 15px;
    }

    .sidebar ul li a {
        font-size: 16px;
    }
}

/* 按钮样式 */
.btn {
    background-color: #ff6600;
    color: #ffffff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.btn:hover {
    background-color: #e65c00;
    transform: scale(1.05);
}

/* 悬停效果 */
.hover-effect:hover {
    color: #ff6600;
    text-decoration: underline;
}

/* 代码示例区块样式 */
.code-example {
    background-color: #1e3c72;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

.code-example code {
    color: #ffffff;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

/* 折叠区域样式 */
.collapsible {
    background-color: #2a5298;
    color: #ffffff;
    cursor: pointer;
    padding: 10px 20px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 16px;
    transition: background-color 0.3s;
    border-radius: 4px;
}

.collapsible:hover {
    background-color: #ff6600;
}

.content {
    padding: 0 20px;
    display: none;
    background-color: #1e1e1e;
    overflow: hidden;
    border-radius: 0 0 8px 8px;
}